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 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.i360day.invoker.socket.handler;

import com.i360day.invoker.WebSocketRequest;
import com.i360day.invoker.WebSocketResponse;
import com.i360day.invoker.common.HttpInvokerRemoteConstant;
import com.i360day.invoker.common.StringUtils;
import com.i360day.invoker.socket.SimpleWebSocketTemplate;
import jakarta.websocket.Endpoint;
import jakarta.websocket.MessageHandler;
import jakarta.websocket.Session;
import org.xnio.Buffers;

import java.nio.ByteBuffer;
import java.util.Optional;

/**
 * @author liju.z
 * @date 2024/4/10 21:13
 */
public class SimpleMessageByteBufferHandler implements MessageHandler.Whole<ByteBuffer> {
    private Session session;
    private Endpoint endpoint;
    private SimpleWebSocketTemplate webSocketTemplate;

    public SimpleMessageByteBufferHandler(Endpoint endpoint, Session session, SimpleWebSocketTemplate webSocketTemplate) {
        this.endpoint = endpoint;
        this.session = session;
        this.webSocketTemplate = webSocketTemplate;
    }

    @Override
    public void onMessage(ByteBuffer byteBuffer) {
        try {
            byte[] body = Buffers.take(byteBuffer).clone();
            WebSocketRequest webSocketRequest = HttpInvokerRemoteConstant.objectMapper.readValue(body, WebSocketRequest.class);

            webSocketTemplate.executeMessageHandlerListener(webSocketRequest.getId(), replyMessageListener -> {
                replyMessageListener.onMessage(body);
            });

            if (StringUtils.isNotEmpty(webSocketRequest.getId()) && webSocketTemplate.getApplicationContext().containsBean(webSocketRequest.getId())) {

                //read
                MessageHandlerListener listener = webSocketTemplate.getApplicationContext().getBean(webSocketRequest.getId(), MessageHandlerListener.class);

                //write
                byte[] bytes = listener.onMessage(session, webSocketRequest.getBody());
                WebSocketResponse response = WebSocketResponse.builder()
                        .id(Optional.ofNullable(webSocketRequest.getReplyTo()).orElse(webSocketRequest.getId()))
                        .body(bytes).build();

                //回复消息
                session.getAsyncRemote().sendBinary(ByteBuffer.wrap(HttpInvokerRemoteConstant.objectMapper.writeValueAsBytes(response)), result -> {
                    if (!result.isOK()) {
                        endpoint.onError(session, result.getException());
                    }
                });
            }
        } catch (Exception ex) {
            this.endpoint.onError(session, ex);
        }
    }
}
